CSS small config and try it

hello i need to config these css and upload it but i want to see the style for it
Cascade Style Sheet File should be in extension of .css
Header Message & Footer File should be in extension of .txt

Guidelines for Cascade Style Sheet File
The cascade style sheet file changes the look and feel of the payment page . It should be in
extension of .css.
Below is the sample code for cascade style sheet . Comments besides the code describe
their properties .
@charset "utf-8";
/* CSS Document */
a{
color:#d7181f; //color of any URL text displayed
}
a:hover{
color:#d7181f; // text color when cursor is moved over any URL text
text-decoration:underline; // text is underlined when cursor is moved over any URL
}
header {
background: #d7181f; // background color of header and footer section
border-bottom:2px solid #db2e34; // size and color of bottom part of header and
footer section.
}Merchant Branding Guidelines Document | ARB Payment Gateway 3.3.0
© 2020 Merchant Branding Guidelines Document Page 8 of 8
.accordion h2 {
border-bottom: 2px solid #3c54af; // bottom border size and color of payment options tabs
}
.btn{
background: #d7181f; // background color of all buttons
}
.btn:hover{
background: #97171b; //background color of all buttons when cursor is moved over them
cursor:pointer; // cursor type when mouse is moved over the buttons
}
.white-text {
color: #ffffff; // color of text displayed in the footer section.
}
The header section mentioned above consists of merchant logo and merchant header
message text and the footer section consists of footer file text. The background , border and
text color of payment page fields can be changed by replacing with the respective color
codes in cascade sheet file. Merchant can verify the look and feel of the payment page in
pay page preview module.
Footer File
The text in footer file is displayed on bottom most part of the payment page and is centre
aligned. The footer file should be in extension of .txt. Merchant can verify the footer file text
displayed on payment page in pay page preview module.

i need to see it and try it as the above instructions